intercalated before the margin is reached. Colvillensis, simulates the bascauda group in having netted sculpture, and to this is due the confusion of the species, but its true affinities are at once shown by the nature of the sinus rib. I have myself made this error by recording Tugalia bascauda from the littoral, Dunedin Harbour (Trans. N.Z. Inst., vol. 55, p. 518, 1924); I now withdraw this, as the trifurcate sinus-rib shows the specimen to belong to the elegans group, and though it is juvenile, the altitude, netted sculpture, and carination characterize it as colvillensis. Bascauda does not seem to enter the Forsterian region, but elegans has already been reported from Banks Peninsula by Iredale (Trans. N.Z. Inst., vol. 40, p. 392, 1908) as “Dead shells in shell-sand”;—these may have been colvillensis also. Ancestral species to these Tugalis occur in the New Zealand Tertiary. I have described (Trans. N.Z. Inst., vol. 56, p. 227, 1926) T. pliocenica and T. navicula from the Pliocene and Miocene respectively, the former being directly ancestral to colvillensis n. sp., the latter of a rather different type, more like the Tertiary Australian T. crassireticulata (Pritchard) (Proc. Roy. Soc. Vict., vol. 8, p. 125, 1896) from Table Cape. Tugali colvillensis n. sp. Shell intermediate in size between elegans Gray and bascauda Hedley, high, laterally compressed and narrowly elongate, tapering slightly in front, where there is a very short truncation due to narrowness of interior groove. Front slope decidedly carinate medially, the central sinus-rib at first single, wide, and strong, but soon breaking into three narrow ribs which continue with sublinear interstices to margin. Sculpture netted, much as in T. bascauda; in the type the ribs are fairly wide and flattish, but most of the paratypes have narrow radial and concentric ribs, swollen at intersections, with tiny square pits between. Height, 8 mm.; length, 21.5 mm.; width, 13 mm. Locality,—Hauraki Gulf, dredged in 20–25 fathoms, near Cape Colville; also Dowling Bay, Dunedin Harbour, one specimen on the littoral, with Emarginula. The specimens were kindly sent for examination by Mr. A. W. B. Powell of Auckland, and the paratypes are in his collection. Scutus ambiguus (Chemnitz, 1795). [P. 103] Suter observed, “E. A. Smith has thoroughly revised the genus in an excellent paper in the Quart. Journ. Conch., vol. 2, p. 250, 1879.” It should be noted that this revision had taken place some thirty odd years previously, so that probably some emendations were necessary. In the place referred to in the preceding note, Hedley recorded some corrections in connection with Australian forms, and indicated breviculus Blainville (Bull. Sci. Soc. Phil., p. 28, 1817) as the name for the Neozelanic species. Puncturella demissa Hedley, 1904. [P. 104] Iredale has named this species as genotype of his Vacerra (1924, pp. 182, 221), which was provided “for the small austral forms ascribed to Puncturella, but which do not closely agree, even in superficial features with the type of that genus.”